Power-transmitting pulley.



W. A. OWEN.

7 POWER TRANSMITTING PULLEY.

APPLIGATION FILED SEPT. 7,1909.

Patenteuimay "17,1910.

2 SHEETS-BHBET 1.

[N VENT 0R VWl/MM A. Wren WITNESSES W. A. OWEN. POWER TRANSMITTING PULLEY. APPLICATION FILED SBPT.7,1909.

95,274 I Patented May 17, 1910.

2 SHEETS-SHEET 2.

m l I ENE l' l z I r I /6 1 F WITNESSES I 11v VENTOR.

WIL IAM A.'OWEN,- OF JOHNSON envy, Tennessee.

, rownnf'rnensm'rmme I PULL Y.

Specification of Letters Patent.

. Mamm 11?, rate.

Application fi-led September 7,1909. Serial No. mecca. I

' T 0 all whom/it may concern:

Be it known that I, WILLIAM A. OWEN, a citizen of the United States, residing at Johnson City, in the county of \Vashington and State of Tennessee,'have invented certain new and useful Improvements in Power- Transmitting Pulleys, of which the following isv a specification.

This invention has relation to certain new and useful improvements in power transmit ting pulleys and comprises a resiliently carried sprocket wheel. a

The object of my inventionis to so construct a sprocket wheel, that the mechanical shocks and vibrations incident to the work ing of the sprocket in connection with certain classes of machinery, will be absorbed or compensated.

With these and other objects in view, the present invention consists in the combination and arrangementof parts as will be hereinafter more fully described and par-' ticularly pointed out in the appended claim, it being understood that changes in the specific structure shown and described ma be made within the scope of the claim wit out departing from the spirit of the invention;

In the drawings forming a part of this Specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 shows a fragmentary side elevation of a sprocket constructed according to my invention. Fig.2 is a central sectional view through the spring housing,

Fig. 3 shows a fragmentary edgeview. 4 is a section on line 44 of Fig. 1,

In the operation of certain classes of machinery, where driving chains are employed in place of belts, it is quite a common,occurrenoe for the chain to tear ofl the sprocket teeth, where the applied power is irregular and the sprocket 1s subjected to sudden changes or unevenness in speed. In my present invention I provide a carrying memer secured to the driving shaft to which is -Fig.

resiliently connected the sprocket, which is ermitted an independent backward and orward movement, within certain against the tension of suitable buffer springs.

In the drawings the numeral 5 designates a driving shaft, 6 a sprocket wheel, and 7 a collar secured to the drivin shaft to hold the sprocket in position, Secured to the spokes 8 of the sprocket wheel 6, by means of the bolts 9, is the arcuate spring case 10 limits,

which'is slotted lengthwise as shown at 11. This arcuate spring case is provided with the two terminal securing ears 13 and the intermediate securing ear 12 the bolts 9 passing throu h these securing ears. The c'ase'has its ends closed and is provided with a middle lengthwise positioned laterally entering slot 11, ending proximal to the ends 14 of the case. Held within the ends 14 of the case are the set screws 15 carrying the lock nuts 16 and at "itsinner end each set screw carries a follower disk 18 as clearly disclosed in Fig. 1. The sprocket 6 is revolubly held upon the shaft 5 and is resiliently connected thereto by means of a buffer arm 20 having the hub 21 whichv by means.

of. a key 22 is fixed to the driving shaft. This bufi'er arm has the offset head2 1 extending laterally from the arm and entering the slot 11 of the arcuate spring case 10. The head. 24 is provided with the lugs 25 extending. in opposite direction as clearly disclosed in Fig. 1. Held upon these lugs 25, and against the follower disks 18, are the helical buffer springs 27 two such springs being employed.

From the foregoing description it will be seen that the sprocket is resiliently connected to the buffer arm 20 and is permitted an independent backward and forward movement against the tension of the buffer springs 27. By means of the set screw 15, the tension of these springs can be nicely regulated. With this arrangement, any sudden or irregular movement of the driving shaft will be absorbed or compensated by the bufier :springs. This attachment maybe fixed to sprocket wheels now in use as the, same forms an independent part of the wheel. i V

The device is simple and inexpenslve in construction and both durable and efiicient v in. operation.

@, eeaam uponieach lu' and working against a fol- 16 lower disk, a1 arranged as and for the purpose set forth.

In testimony whereof I afix my signature,

in presence of two witnesses.

terminal securin ears with a middle lengthwise positioned laterally entering slot ending roximal to said case ends, each case end havlng a threaded opening, said head being arranged to enter said slot and centrally hel in sai case, a set screw within each case end, WILLIAM A. OWEN. a follower disk at each end of said case and Witnesses:

working against a set screw, and two helical J. T. CECIL,

springs within said case, one being. carried 7 G. (in MITCHELL. 

